text: /*
   * Copyright 2010 Red Hat Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
   * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   * OTHER DEALINGS IN THE SOFTWARE.
   *
   * Authors: Ben Skeggs
   */
  
  #ifndef __NOUVEAU_VM_H__
  #define __NOUVEAU_VM_H__
  
  #include "drmP.h"
  
  #include "nouveau_drv.h"
  #include "nouveau_mm.h"
  
  struct nouveau_vm_pgt {
  	struct nouveau_gpuobj *obj[2];
  	u32 refcount[2];
  };
  
  struct nouveau_vm_pgd {
  	struct list_head head;
  	struct nouveau_gpuobj *obj;
  };
  
  struct nouveau_vma {
  	struct list_head head;
  	int refcount;
  	struct nouveau_vm *vm;
  	struct nouveau_mm_node *node;
  	u64 offset;
  	u32 access;
  };
  
  struct nouveau_vm {
  	struct drm_device *dev;
  	struct nouveau_mm mm;
  	int refcount;
  
  	struct list_head pgd_list;
  	atomic_t engref[16];
  
  	struct nouveau_vm_pgt *pgt;
  	u32 fpde;
  	u32 lpde;
  
  	u32 pgt_bits;
  	u8  spg_shift;
  	u8  lpg_shift;
  
  	void (*map_pgt)(struct nouveau_gpuobj *pgd, u32 pde,
  			struct nouveau_gpuobj *pgt[2]);
  	void (*map)(struct nouveau_vma *, struct nouveau_gpuobj *,
  		    struct nouveau_mem *, u32 pte, u32 cnt,
  		    u64 phys, u64 delta);
  	void (*map_sg)(struct nouveau_vma *, struct nouveau_gpuobj *,
  		       struct nouveau_mem *, u32 pte, u32 cnt, dma_addr_t *);
  
  	void (*map_sg_table)(struct nouveau_vma *, struct nouveau_gpuobj *,
  			     struct nouveau_mem *, u32 pte, u32 cnt, dma_addr_t *);
  	void (*unmap)(struct nouveau_gpuobj *pgt, u32 pte, u32 cnt);
  	void (*flush)(struct nouveau_vm *);
  };
  
  /* nouveau_vm.c */
  int  nouveau_vm_new(struct drm_device *, u64 offset, u64 length, u64 mm_offset,
  		    struct nouveau_vm **);
  int  nouveau_vm_ref(struct nouveau_vm *, struct nouveau_vm **,
  		    struct nouveau_gpuobj *pgd);
  int  nouveau_vm_get(struct nouveau_vm *, u64 size, u32 page_shift,
  		    u32 access, struct nouveau_vma *);
  void nouveau_vm_put(struct nouveau_vma *);
  void nouveau_vm_map(struct nouveau_vma *, struct nouveau_mem *);
  void nouveau_vm_map_at(struct nouveau_vma *, u64 offset, struct nouveau_mem *);
  void nouveau_vm_unmap(struct nouveau_vma *);
  void nouveau_vm_unmap_at(struct nouveau_vma *, u64 offset, u64 length);
  void nouveau_vm_map_sg(struct nouveau_vma *, u64 offset, u64 length,
  		       struct nouveau_mem *);
  void nouveau_vm_map_sg_table(struct nouveau_vma *vma, u64 delta, u64 length,
  			     struct nouveau_mem *mem);
  /* nv50_vm.c */
  void nv50_vm_map_pgt(struct nouveau_gpuobj *pgd, u32 pde,
  		     struct nouveau_gpuobj *pgt[2]);
  void nv50_vm_map(struct nouveau_vma *, struct nouveau_gpuobj *,
  		 struct nouveau_mem *, u32 pte, u32 cnt, u64 phys, u64 delta);
  void nv50_vm_map_sg(struct nouveau_vma *, struct nouveau_gpuobj *,
  		    struct nouveau_mem *, u32 pte, u32 cnt, dma_addr_t *);
  void nv50_vm_unmap(struct nouveau_gpuobj *, u32 pte, u32 cnt);
  void nv50_vm_flush(struct nouveau_vm *);
  void nv50_vm_flush_engine(struct drm_device *, int engine);
  
  /* nvc0_vm.c */
  void nvc0_vm_map_pgt(struct nouveau_gpuobj *pgd, u32 pde,
  		     struct nouveau_gpuobj *pgt[2]);
  void nvc0_vm_map(struct nouveau_vma *, struct nouveau_gpuobj *,
  		 struct nouveau_mem *, u32 pte, u32 cnt, u64 phys, u64 delta);
  void nvc0_vm_map_sg(struct nouveau_vma *, struct nouveau_gpuobj *,
  		    struct nouveau_mem *, u32 pte, u32 cnt, dma_addr_t *);
  void nvc0_vm_unmap(struct nouveau_gpuobj *, u32 pte, u32 cnt);
  void nvc0_vm_flush(struct nouveau_vm *);
  
  #endif
  